clang/test/Sema/align-x86.c

   1 // RUN: %clang_cc1 -std=c11 -triple i386-apple-darwin9 -fsyntax-only -verify %s
   2 // expected-no-diagnostics
   3
   4 #define STATIC_ASSERT(cond) _Static_assert(cond, #cond)
   5
   6 // PR3433
   7 #define CHECK_ALIGNMENT(type, name, abi, pref) \
   8   type name; \
   9   STATIC_ASSERT(__alignof__(name) == pref); \
  10   STATIC_ASSERT(__alignof__(type) == pref); \
  11   STATIC_ASSERT(_Alignof(type) == abi)
  12
  13 CHECK_ALIGNMENT(double, g_double, 4, 8);
  14 CHECK_ALIGNMENT(long long, g_longlong, 4, 8);
  15 CHECK_ALIGNMENT(unsigned long long, g_ulonglong, 4, 8);
  16 CHECK_ALIGNMENT(_Complex double, g_complexdouble, 4, 8);
  17
  18 // PR6362
  19 struct __attribute__((packed))
  20 packed_struct {
  21   unsigned int a;
  22 };
  23 CHECK_ALIGNMENT(struct packed_struct, g_packedstruct, 1, 1);
  24 STATIC_ASSERT(__alignof__(g_packedstruct.a) == 1);
  25
  26 typedef double arr3double[3];
  27 CHECK_ALIGNMENT(arr3double, g_arr3double, 4, 8);
  28
  29 enum big_enum { x = 18446744073709551615ULL };
  30 CHECK_ALIGNMENT(enum big_enum, g_bigenum, 4, 8);
  31
  32 // PR5637
  33
  34 #define ALIGNED(x) __attribute__((aligned(x)))
  35
  36 typedef ALIGNED(2) struct {
  37   char a[3];
  38 } aligned_before_struct;
  39
  40 STATIC_ASSERT(sizeof(aligned_before_struct)       == 3);
  41 STATIC_ASSERT(sizeof(aligned_before_struct[1])    == 4);
  42 STATIC_ASSERT(sizeof(aligned_before_struct[2])    == 6);
  43 STATIC_ASSERT(sizeof(aligned_before_struct[2][1]) == 8);
  44 STATIC_ASSERT(sizeof(aligned_before_struct[1][2]) == 6);
  45
  46 typedef struct ALIGNED(2) {
  47   char a[3];
  48 } aligned_after_struct;
  49
  50 STATIC_ASSERT(sizeof(aligned_after_struct)       == 4);
  51 STATIC_ASSERT(sizeof(aligned_after_struct[1])    == 4);
  52 STATIC_ASSERT(sizeof(aligned_after_struct[2])    == 8);
  53 STATIC_ASSERT(sizeof(aligned_after_struct[2][1]) == 8);
  54 STATIC_ASSERT(sizeof(aligned_after_struct[1][2]) == 8);